12535423520 has 48 divisors (see below), whose sum is σ = 29621749248. Its totient is φ = 5013016320.

The previous prime is 12535423493. The next prime is 12535423543. The reversal of 12535423520 is 2532453521.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1167617 + ... + 1178303.

It is an arithmetic number, because the mean of its divisors is an integer number (617119776).

Almost surely, 2^12535423520 is an apocalyptic number.

12535423520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12535423520 is an abundant number, since it is smaller than the sum of its proper divisors (17086325728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12535423520 is a wasteful number, since it uses less digits than its factorization.

12535423520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18033 (or 18025 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 12535423520 in words is "twelve billion, five hundred thirty-five million, four hundred twenty-three thousand, five hundred twenty".